Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5725268 | Pet waste retrieval and disposal device | Robert P. Ryan | 1998-03-10 |
| D357254 | Combination hearing protector and sound amplifier | — | 1995-04-11 |
| D324219 | Combined microphone and parabolic reflector | — | 1992-02-25 |
| D310390 | Electronic game | — | 1990-09-04 |
| D301145 | Stereophone or similar article | Donald R. Wagner, Michael J. Koss | 1989-05-16 |
| D299025 | Headphone | — | 1988-12-20 |
| 4517418 | Portable stereophone | Michael S. Baran, Wayne L. Warren, Allen W. Montgomery | 1985-05-14 |
| 4404434 | Collapsible stereophone | Thomas E. Pelt | 1983-09-13 |
| D265557 | Stereo headphone | — | 1982-07-27 |
| D255352 | Headphone | — | 1980-06-10 |